json/jsonb inconsistence

# select '"\uaBcD"'::json;
json
----------
"\uaBcD"

but

# select '"\uaBcD"'::jsonb;
ERROR: invalid input syntax for type json
LINE 1: select '"\uaBcD"'::jsonb;
^
DETAIL: Unicode escape values cannot be used for code point values above 007F
when the server encoding is not UTF8.
CONTEXT: JSON data, line 1: ...

and

# select '"\uaBcD"'::json -> 0;
ERROR: invalid input syntax for type json
DETAIL: Unicode escape values cannot be used for code point values above 007F
when the server encoding is not UTF8.
CONTEXT: JSON data, line 1: ...
Time: 0,696 ms

More than, json looks strange:

# select '["\uaBcD"]'::json;
json
------------
["\uaBcD"]

but

# select '["\uaBcD"]'::json->0;
ERROR: invalid input syntax for type json
DETAIL: Unicode escape values cannot be used for code point values above 007F
when the server encoding is not UTF8.
CONTEXT: JSON data, line 1: [...

Looks like random parse rules.

--
Teodor Sigaev E-mail: teodor(at)sigaev(dot)ru
WWW: http://www.sigaev.ru/